Type-writing machine.



Patented Mar. 16, 1909.

2 SHEBTSSHEI1T l.

J. D. DAUGHERTY.

TYPE WRITING MACHINE.

APPLIUATION FILED MAY1l,1906.

J. D. DAUGHERTY.

TYPE WRITING MACHINE.

APPLIGATION FILED MAY 11, 1906,

915,662. Patented Mar. 16, 1909.

2 SHBETS -SHBET 2.

UNITED STATES PATENT OFFICE.

JAMES DENNY DAUGHERTY, OF KITTANNING, PENNSYLVANIA, ASSIUNOR TO UNIONTYPE- WRI'IER ffiMPANY, A CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE Application filed May 11,

Specification of Letters Patent.

Patented March 16, 1909.

1906. Serial No. 816,2.

To all whom it may concern.

Be it known that 1, JAMES Drzxxr DAUGHERTY, a, citizen of the UnitedStates, residing at Kittsnnin in thc countv of Armstrong and State oiPennsylvania, have invented certain new and useful Improvements in'lypc-Writiug Machines, of which the following is a specification,reference being had therein to the accompanying drawmgs.

This invention relates to cscapement mechanism, designed especially forthe csrrings of a writing machine, and the primary ob ect thereof is toobviate the uncontrolled jumping or jerking advancing movements of thecarriage between impressions, and the noise occasioned thereby,objections incident to man) writing machine escapemcnts of prior design.I accomplish this hr having the escape-merit under constant and positivespeed control. 'ith the cscapcmcnt under P05111113 control of theimpression mechanism their movements are synchronous, and mechanicallyaccurate spacing is attained, it being impossible for the carriage tomove faster or slower than the impression mesh anism.

The invention is )refcrahh; so embodied that the carriage is ield rigidwhen the impression mechanism is at the limits of its movement, and isunder controlled mos-"ement while the impression mechanism is in motion,with the result that the feed movement' is divided, part occurringbefore and part after each unpression. hese movements may he of e ualextent, or the movement precedin t c impression may be greater or less1; ion the other, it. being only essential that the movementsintervening between successive impressions shall total a full space.

While the improved escapement may be adapted to machines of variousmakes, Iv have in the accompanying drawings shown the same applied to a,Smith Premieii ma chine, Figure 1 being the rear-elevation tloreof andFig. 2 a vertical sectional view, portions onl of the organized machinebeing shown. igs. 3 and 4 are detail views of the esca'pement mechanism,the views showing the releasing dogs in reverse sition. Fig. 5 isja. diarammstic View of thi-escapement whcel an dogs.

Referring to the drawings, 2 designates the 'upper portion of themachine-frame, 3 the cal-lingo, and 4 the platen.

5 is the rack-bur extending longitudinally of the carriage and withwhich the escapementmechanism cooperates.

Journalcd in the rear portion of the frame is shaft 6 having at itsinner cnd ratchet gearing 7 such as that ordinarily employed in theSmith Premier machine #4 and which is shown and described in the patentto Brown No. 615,343, dutcd Dec. 6th, 1898. This 50- cslled ratchetgeariu meshes with the rack 5. An escape-mom whetil S is secured to therear end of the shaft 6 and the ratchet gearing 7 constitutes on u)emtive connection between the rock 5 and the shaft 6, whrrch;- thecarriage may he moved to the right independently of the shaft andcscupeinent wheel but cannot move to the left independcntlv of saidparts without affecting a release through the usual release key (notshown).

9 designates the rock-shaftto which keystem 10 is connected, and 11 isthe link which transmits motion from said shaft to rock-shaft 12.carrying tYpe-bar 13 which strikes upwardly against platen 4 when makingan impression.

14 is the oscillating gate in the rear of the machine which hasuniversal connection with all of shafts 9 by meansof :1- lug 15 carriedby each shaft and engaging a suitable surface of the gate.

16 is the spring against which the gate pulls when a key is depressedand which operates to return the gate and key to normal position.

The parts thus far referred to, with the exception of wheel 8, appear inthe Smith Premier machine, and are well known in the ant.

The outwardly taered or point-ed teeth 17 of escapement whee 8 arepreferably of cycloida-l form. The curved ed cs 18 of adjacent teethconverge inward y, with their inner or lower pDl't-IODS near the basesof the teeth straight or parallel to form the dogspaces 19.

Fulcrumed at .20 to the rear part 2 ol' the frame is lever 21 having atits lower end slot-and-pin connection 22 with gate 14, and at its upperend fork or yoke '23, the arms of which extend upwardly atopposite sidesof escspcment wheel these-arms are do 525 and 26, here shown in the.form of he crank levers, each pro- 8. Pivoted at 24 to vided with atooth 2 5 26 rcspeetivelv,

which play in and out hetween teeth 17. A

slot-endin connection 27 eflords eeeh of the dogs 'uiited indepei'identmovement on its pivot 24. 5 ring QS' iSarmn ed to hold dogflfi with toot1 3e i'iormelly e evsted and resists depression 'therenf awhile nsimilar 's'pring 28 holds dog 25 with teoth 25 normelly de lu'essed tendresisting elevation 1e thereof. eeth 25, and 26 are of 'epprexi';

The normal positionv of. the eeeapement mechanism is as shown in F lg.Eggtwith'iiog 25 in inward position and toothZSthereof within space 19and ositiv ely holding and loekin wheel 8, the d dg having been turned,to th'elimit of its movement against the poll. of spring 28'. While itkey is being. de-

ressed, the dog-carrier and dogs are mov-j mg sinmlteneouslv therewith,the; position of the carrier and dogs hein 1 118 shown in Fig. 4 at thecompletion ol ti sion,'end when the key is released the'meehanismreturns to the position shoi m in Fig.6,

Referring now to Fig. 3, as dog 25 movesj outwerd,-'the curved edgeiof,the' active tooth 17 beers upwardly against. dog-tooth,

25', the teeth disengn ing just before dogi25;

reaches the outward lirrut of its movement;

Meanwhile, dog 26 is moving inward between two of' teeth 17 at theoFposite sideof .wheel 8, and tooth 2.5 theme is brouriht intoenigemen't with the curved um er edge, -of t e tooth l7 descendingtoward it. This engagement takes place and dog 26 is oscih leteddownwardly thro ugh'its limite'l indet pendent movement bel'oredog,Eli-his bc-, come entiroly-disenga ed,.so thetl'or amnppreeinhle ti r'nehoth ofrlogs 25 and 28 are n positive engagement with the teeth of the 1ese' pement wheel, thus making independent m vement of the letterabsolutely imposeihl'e,

th wheel being under osilive control 01 one.

or he other or hath k eggs at elltiines. r B th time dog 25 andits-tooth25"heve moved on ide the radius of. teeth 17, dog 26 end its;0th 26 are in inward position within s1: e 19, andholding theeseagxinent;- wheel rig and l oked, t being at that instant th t theimpression takes place. dog25 has in its outward movement cleared toqtlh17, it is retract-ed hy spring 28sinto nlinement with afreshteeth-separat ng or,

interdental space em in position to cooperate in effecting the n x:advenceof the en, eupement wheel.

into elinement with e fresh spei'e. lhe

active engagem nt of ear-h dug with wheel, 8.

1e" ,key depres- As soon as y In like manner, whenin, moving .outwnrddog 26 has elenred' rts engaged tooth 17. it is OS'.'"li l.l3t:iluvsprmg 38;,-

While: this outward movement, combined with the curved edges of teeth17, affords wheel S eontrolled movement in response to the pull ortension of the carriage said pull or tension, transmitted thron h t ecurved edge-9f tooth-l7, oceeleretps 1; 1e movement of the dog,Tliu's,.insten'd of the pull of the earl-Inge being directly opposed tothe movement-of the rseepementmeehenlsrn, as heretofore, it assists thesame, and thereby very appreciably lightens the touch.

From the foregoing description it will be understoodthet the carriage isa. power driven eerriage propelled by theusnel s ring drum shown in.Fig. 1, that each toot '17 of the feed mole-which is shown in thepresent inwe rking face which is inclined or beveled. and allowsanadvance of the escapeinent wheel and eerri: ednring a disengagingmovement of each dog, and that each dog engages alternritely on onesidoend then on the other of each tooth, of the eseapementwheel.

ferred embodiment of the eseepen ent mechanism with the same applied toa maehineof particular type, it will be understood that the inventionmay be variously embodied, and adapted to, verious 'makes of machineswithout departing from'the invention-. And whiledesigned primarily foruse in writing be, employed in ct ever such mechanism is required.

,I elaimz- 3 i 1. .In ajwritin machine, t carriage eseapemerit memberMing teeth, and inversely ,operelting dogs adapted to play in and outstance as an csoapement wheel, has a front ma.ehir ios, the nngiroved'jeseapement, may. or QZOHLLBCUOHE 'or where While Lhave shown anddescribed a prehetween the teeth and mounted-to move,

therewith, one or other of said dogs ate-ll times engaged with andpositively controlling the rscapenient member.

Anescepement device lmvin an advn-neing movement and provided withteeth, the edges of ndjaeept teeth eonvergin inwerdly and forminginclined working aces and forming a dog receiving space near the heapsof the teeth, and inversely operating dogs of the same width as saidspaces near the hoses of the teethend adapted to play in and out betweenthe teeth and in and out of said spades.

1- 3. An seulpement' devieehaving an advgmeing movement and provided wth teeth the edges of the adjacent teeth being rounded Ito. form roundedworking feces'and convverginginwardly and forming a, dog-space near thebases of the teet-h, end inversely oys-rating dogs ofthe same width assaid spa :es nen'r the bases of tl'geteeth and adapted to 'lln'v in andout between the teeth and in on: ontof sniLljspz-ees. I

} venting inovemelit'end provided with teeth out the entire outward,rno-L-cment thereoll. ot e eloidalferri to" provide inclined worksaidspacesl In a writing machine device having teeth of cyeloidal fonfi torovide inclined working faces and having ogs apes'between adj acentteethnear the bases t ereof, and mvemely operatingdo ,ada ted fit'said-spaccsnear and play 1n and out'between-thc teeth and from the wheel t thebaseso the teeth in and out of saiddog-s aces.

6; In awutmg mac no, on cscapement device havmgiteeth with dog-spacesbetween the bases of adjacent teeth, inversely operating dogs'adapted tofit said spaces and play in ancient between the teeth and in and out ofsaid s aces and when in the latter 0 crating" to 110' d the escapementdevice rigi and means operating wheneach dogis in outwiird positiontoaline that-dog with a fresh teethseparfating space.

7. A carriage es'capement comprising ,a tensioncd toot 10!] wheel,-inversely operating dogs adopted to engage the wheel, each dog havingspring-op osed limited movement in the direction 0 rotation of thewheel, and

,means'for so moving the dogs toward and' het-one dog s at theliniit Jof its independent movement-audio. posimentwith'a tootn thereof tiveengagement with atooth thereof before thegpther dog'- is disengaged. 1Acarnage escapen'ient comprising. .a' tensioned wheel havmg teeth ofcycloidal form; the edges of'adjacent'teethforming at their inner ends adog-space, inversely operating dogs adapted to enter between theteethand fit said spaces, each doghaving springopposed limited movementin the direction of rotation of the wheel, and means for 50 moving the(logs toward and from the wheel that one dog is at the limit oftitsindependent movement and in rositive engageefore the other ring isdisengaged. l

9. A com o escapement comprising a tensioned mo thed wheel, anoscillating carrier extending to o posite sides of the wheel, a dogpivoted to t- \0 carrier at each side of the wheel and adapted to hemoved by the oscillating carrier in and out between the wheel teeth,each dog having limited springopposed movement on its pivot in thedirectmn of rotation of the wheel.

10. A carriage escapcment comprising a tensioned toothed wheel, anoscilletin frame extending to opposite sides ofthe hoal, a dog ofbell-crank form pivoted to the carrier at each side of the wheel, thepivoted dogs emcee the teeth and adapted to lay in an escapement.

and said dog-spaces, the eng each dog being of the some wi ing faces anda pair of feed dogs that portions of which move in the having limitedtumin movement in the direction of rotation of t e wheel, and a springfor each dog connected to an arm thereof for opposing saidliniitedmovement.

11. An escapement device having an advancing movement and provided withteeth,

the cdgesof adjacent teeth converging inwardly and forming a dog-spacenear the' bases of the teeth, said space havi parallel s'ide walls, andinversely opera mg dogs adapted to play in and out between the teeth ingportion of th as the dogspaces and haV'ingparallel sidefaces. 12. In awriting machine, a carriage es? capement member huvin teeh, andinversely operating dogs adiipted to play in and out between the teeth,one or, other of said dogs at all times engaged with and )ositivelcontrolling the escapem'ent mom er. 13. In a typewriting machine, thecom bination of a carriage, an esce mg teeth with inclined wor g faces,and a pen of'feed-clogs that co-act with said ingagement of each dogfrom the rack.

14. In a type'writing machine the combination of a power drivencarriage, an escapement wheel hnvin teeth with'inclincd workcngag planepf the lescapement wheel and coast with said working faces and enable anadvance of the escapement wheel to take lace during the diseng 'ement ofeach dog mm the escapement w eel.

15. In a typewriting machine, the combination of a power drivencarriage, an escapement wheel having teeth with inclined working faces,and a pair ofiindependently pivoted spring pressed eed dogs the engagin'portions of which move in the planes of t e escapement wheel and c o-actwith said working facesvond enable an advance of the escapemcnt wheel totake place during the disen= gagement of each dog from the escapementwheel.

16. In a typewriting machine, the combination of a feedrack each toothof which has inclined working faces on opposite sides thereof, and a airof independently pivoted spring pressed eed dogs that co-act mth saidinclined working faces during the movement of said dogs toward and awayfrom the feed rack.

In testimony whereof I aflix my signature in presence of two witnesses.r

JAMES DENNY DAUGHERTY.

Witnesses:

IIIARY' MOLAUGHLIN, j ROLAND B. SIMPSON.

ement rack hcvclined working faces and enable an advance 'of' the rackto take place during the disen-

